I've had the same problem. The phone used to drain at between 3-4 percent per hour. Ever since the recent update (prior to MM), it's been over 7% average. Same usage, same places. Now I'm back to having to monitor the phone all day and it's getting on my last damn nerve. I have done several cache-wipes but really don't want to do a reset.
I was really hoping that MM, with this Doze feature, would have restored the longevity I was accustomed to but I'm disappointed that it seems to have had zero effect.
PS - I have never tried a reset to this phone. Is there a way to easily restore it or will I have to manually backup everything (pictures, music, etc.) and restore them and redo all my settings, Nova setup, etc?